Using OpenSSL CLI to Check Information from Certificates in PEM Format

In the world of DevOps, managing and verifying SSL/TLS certificates is a crucial task to ensure secure communication between systems. OpenSSL, a robust open-source toolkit, provides a command-line interface (CLI) that allows you to perform various operations on certificates, including checking information from certificates in PEM format. This article will guide you through the process of using OpenSSL CLI to extract and verify information from PEM-encoded certificates. What is PEM Format?